feat: Added file italics

lib/src/channel_preview.dart

@@ -236,6 +236,7 @@ class ChannelPreview extends StatelessWidget {
           text: _getDisplayText(
             text,
             lastMessage.mentionedUsers,
+            lastMessage.attachments,
             StreamChatTheme.of(context).channelPreviewTheme.subtitle.copyWith(
                 color: StreamChatTheme.of(context)
                     .channelPreviewTheme
@@ -259,8 +260,12 @@ class ChannelPreview extends StatelessWidget {
     );
   }
 
-  TextSpan _getDisplayText(String text, List<User> mentions,
+  TextSpan _getDisplayText(
-      TextStyle normalTextStyle, TextStyle mentionsTextStyle) {
+      String text,
+      List<User> mentions,
+      List<Attachment> attachments,
+      TextStyle normalTextStyle,
+      TextStyle mentionsTextStyle) {
     var textList = text.split(' ');
     List<TextSpan> resList = [];
     for (var e in textList) {
@@ -269,6 +274,13 @@ class ChannelPreview extends StatelessWidget {
           text: '$e ',
           style: mentionsTextStyle,
         ));
+      } else if (attachments
+          .where((e) => e.title != null)
+          .any((element) => element.title == e)) {
+        resList.add(TextSpan(
+          text: '$e ',
+          style: normalTextStyle.copyWith(fontStyle: FontStyle.italic),
+        ));
       } else {
         resList.add(TextSpan(
           text: '$e ',

lib/src/message_search_item.dart

@@ -129,6 +129,7 @@ class MessageSearchItem extends StatelessWidget {
       text: _getDisplayText(
         text,
         message.mentionedUsers,
+        message.attachments,
         StreamChatTheme.of(context).channelPreviewTheme.subtitle.copyWith(
               fontStyle: (message.isSystem || message.isDeleted)
                   ? FontStyle.italic
@@ -155,8 +156,12 @@ class MessageSearchItem extends StatelessWidget {
     );
   }
 
-  TextSpan _getDisplayText(String text, List<User> mentions,
+  TextSpan _getDisplayText(
-      TextStyle normalTextStyle, TextStyle mentionsTextStyle) {
+      String text,
+      List<User> mentions,
+      List<Attachment> attachments,
+      TextStyle normalTextStyle,
+      TextStyle mentionsTextStyle) {
     var textList = text.split(' ');
     List<TextSpan> resList = [];
     for (var e in textList) {
@@ -165,6 +170,13 @@ class MessageSearchItem extends StatelessWidget {
           text: '$e ',
           style: mentionsTextStyle,
         ));
+      } else if (attachments
+          .where((e) => e.title != null)
+          .any((element) => element.title == e)) {
+        resList.add(TextSpan(
+          text: '$e ',
+          style: normalTextStyle.copyWith(fontStyle: FontStyle.italic),
+        ));
       } else {
         resList.add(TextSpan(
           text: '$e ',